Rotatable tube scrubber



FIG. 1 is a perspective view of the rotatable tube scrubber showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear and opposite sides being identical in appearance;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top plan view of an alternate embodiment of the rotatable tube scrubber showing my new design, this embodiment being identical to the first except for the four circles shown on the head. 

The ornamental design for a rotatable tube scrubber, as shown and described. 